Add ApkInfo.proto to 'aapt2-protos' artifact that was missed initially.

Test: no code changes
Change-Id: Ib0b99019f39fb45d2a66e0ab57afa83bef3d6fbe
diff --git a/tools/aapt2/Android.bp b/tools/aapt2/Android.bp
index 7323b0f..977b276 100644
--- a/tools/aapt2/Android.bp
+++ b/tools/aapt2/Android.bp
@@ -220,6 +220,7 @@
     name: "aapt2-protos",
     tools: [":soong_zip"],
     srcs: [
+        "ApkInfo.proto",
         "Configuration.proto",
         "ResourcesInternal.proto",
         "ResourceMetadata.proto",